In this essential reference, both students and practitioners in the field will find an accessible discussion of electric power generation with gas turbine power plants, using quantitative and qualitative tools. Beginning with a basic discussion of thermodynamics of gas turbine cycles from a second law perspective, the material goes on to cover with depth an analysis of the translation of the cycle to a final product, facilitating quick estimates. In order to provide readers with the knowledge they need to design turbines effectively, there are explanations of simple and combined cycle design considerations, and state-of-the-art, performance prediction and optimization techniques, as well as rules of thumb for design and off-design performance and operational flexibility, and simplified calculations for myriad design and off-design performance. The text also features an introduction to proper material selection, manufacturing techniques, and construction, maintenance, and operation of gas turbine power plants.

Gas Turbines for Electric Power Generation

Performance enhancement of the gas turbine combined cycle by simultaneous reheating, recuperation, and coolant inter-cooling

Transient modelling and simulation of gas turbine secondary air system

This paper describes the project GivEn that develops a novel multiobjective optimization process for gas turbine blades and vanes using modern “adjoint” shape optimization algorithms. Given the many start and shut-down processes of gas power plants in volatile energy grids, besides optimizing gas turbine geometries for efficiency, the durability understood as minimization of the probability of failure is a design objective of increasing importance. We also describe the underlying coupling structure of the multiphysical simulations and use modern, gradient based multiobjective optimization procedures to enhance the exploration of Pareto-optimal solutions.

GivEn—Shape Optimization for Gas Turbines in Volatile Energy Networks

A simple multi-physical system for the potential flow of a fluid through a shroud in which a mechanical component, like a turbine vane, is placed, is modeled mathematically. We then consider a multi criteria shape optimization problem, when the shape of the component is allowed to vary under a certain set of 2nd order Holder continuous differentiable transformations of a baseline shape with boundary of the same continuity class. As objective functions, we consider a simple loss model for the fluid dynamical efficiency and the probability of failure of the component due to repeated application of loads that stem from the fluid's static pressure. For this multi-physical system, it is shown that under certain conditions the Pareto front is maximal in the sense that the Pareto front of the feasible set coincides with Pareto front of its closure. We also show that the set of all optimal forms with respect to scalarization techniques deforms continuously (in the Hausdorff metric) with respect to preference parameters.

An analytical study in multi physics and multi criteria shape optimization

This long-awaited, physics-first and design-oriented text describes and explains the underlying flow and heat transfer theory of secondary air systems. An applications-oriented focus throughout the book provides the reader with robust solution techniques, state-of-the-art three-dimensional computational fluid dynamics (CFD) methodologies, and examples of compressible flow network modeling. It clearly explains elusive concepts of windage, non-isentropic generalized vortex, Ekman boundary layer, rotor disk pumping, and centrifugally-driven buoyant convection associated with gas turbine secondary flow systems featuring rotation. The book employs physics-based, design-oriented methodology to compute windage and swirl distributions in a complex rotor cavity formed by surfaces with arbitrary rotation, counter-rotation, and no rotation. This text will be a valuable tool for aircraft engine and industrial gas turbine design engineers as well as graduate students enrolled in advanced special topics courses.

Bijay Sultanian

Papers

Gas Turbines: Internal Flow Systems Modeling